One major function of the 80186/80188 series was to reduce the
number of chips required.

"To satisfy this market, we defined a processor with a
significant performance increase over the 8086 that also
included such common peripheral functions as
software-controlled wait state and chip select logic, three
timers, priority interrupt controller, and two channels of DMA
(direct memory access). This processor, the 80186, could
replace up to 22 separate VLSI (very large scale integration)
and TTL (transistor-transistor logic) packages and sell for
less than the cost of the parts it replaced."